After today's F8 updates I am seeing in /var/log/dmesg PCI: Setting latency timer of device 0000:00:01.0 to 64 assign_interrupt_mode Found MSI capability Allocate Port Service[0000:00:01.0:pcie00] Uhhuh. NMI received for unknown reason a1 on CPU 0. You have some hardware problem, likely on the PCI bus. Dazed and confused, but trying to continue PCI: Setting latency timer of device 0000:00:1c.0 to 64 assign_interrupt_mode Found MSI capability Allocate Port Service[0000:00:1c.0:pcie00] Allocate Port Service[0000:00:1c.0:pcie02] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3] C4[C3]) ACPI: Processor [CPU0] (supports 8 throttling states) ACPI Exception (processor_core-0819): AE_NOT_FOUND, Processor Device is not present [20070126] ACPI: Thermal Zone [THM] (56 C) The machine continues to book OK... this happened after and update quite a while back but stopped happening after a further update was available soon after that. However with F8 my machine has been solid until now. Machine is a Dell D610 with Core Duo ...